Betting Calculators
Closing Line Value Calculator
Measure your betting edge by comparing your odds to the closing line. CLV is the best predictor of long-term betting profitability.
How to Use This Calculator
- Enter the odds you got when you placed your bet
- Enter the closing odds (final odds before the event started)
- Enter your stake amount
- View your CLV percentage, edge, and expected profit
Formula
CLV % = (Your Odds / Closing Odds - 1) x 100
Edge = Closing Probability x (Your Odds - 1) - (1 - Closing Probability)
Expected Profit = Edge x Stake
Where Closing Probability = 1 / Closing Decimal Odds
Frequently Asked Questions
What is closing line value (CLV)?
Closing line value measures whether you got better odds than the final (closing) odds before an event starts. The closing line is considered the most efficient price because it incorporates all available information. Consistently beating it is the strongest indicator of long-term betting profitability.
Why is CLV important?
CLV is the single best predictor of long-term betting success. Research shows that bettors who consistently get positive CLV are profitable over time, even if their individual bet results vary. It measures skill rather than luck.
What is a good CLV percentage?
Any consistently positive CLV indicates an edge. Even +1-2% CLV sustained over many bets suggests sharp betting ability. Professional bettors typically achieve 2-5% average CLV across their bets.
How do I track my CLV?
Record the odds you take when placing each bet, then check the closing odds just before the event starts. Use this calculator to measure the difference. Track your average CLV over hundreds of bets for a meaningful sample.